<div class="gmail_quote">On Sat, Jan 7, 2012 at 19:03, Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> The number of pending requests correlates to the number of batches queued and so with the amount of work being performed by the GPU. We borrow the concept of loadavg from the scheduler, using the count of batches as the count of runnables, and simply adjust the timescales for a 60x higher sample rate, i.e. the three values are the load average for approximately the last 1s, 5s and 15 respectively. The counter is started only once GPU activity is detected, and is then sampled at 60 Hz until 10s after the GPU goes idle before the counters are reset and sampling ceases. Sample output for running aa10text under gnome-shell: Total: 55.29 57.54 61.14 render ring: 54.80 57.17 60.76 gen6 bsd ring: 0.00 0.00 0.00 blt ring: 0.48 0.37 0.37 Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Cc: Eugeni Dodonov <<a href="mailto:eugeni.dodonov@intel.com">eugeni.dodonov@intel.com</a>> </blockquote><div> Very nice one! Reviewed-by: Eugeni Dodonov <<a href="mailto:eugeni.dodonov@intel.com">eugeni.dodonov@intel.com</a>> Acked-by: Eugeni Dodonov <<a href="mailto:eugeni.dodonov@intel.com">eugeni.dodonov@intel.com</a>> </div></div>-- Eugeni Dodonov<a href="http://eugeni.dodonov.net/" target="_blank"> </a>